Indicating means



Dec.- 11, 1928. 1,694,907

J. w. ANDERSON INDICATING MEANS Filled Maren 2e, 1927 5 sheets-sheet 1 @y Ws Dec. 11, 1928.

J. W. ANDERSON INDIGATING MEANS Filed March 28, 1927 5 Sheets-*Sheet 2 www. f@

Dec. ll, 1928. Y 1,694,907 J. w. ANDERSON l INDICATING MEANS Filed Mam ze, 1927 s sheets-*sheet s l 'l MWI/'677 33;? v @707777 /f. derson Patented Dec. 1l, 192'8.

UNITED srra'rr-s 1,694,907 PATENTl OFFICE..

JOHN W. ANDERSON, OF VGARY, INDIANA..

' INDICATING MEANS.

Application filed March 28, 1927. Serial No. 178,993.

My invention relates broadly to indicating devices and particularly to indicating de-V A particular object of the present inven-` tion is to provide a device of the kind. de. scribed which will function efliciently, is neat and compact and may be easily and quickly mounted upon radiators which are now in existence as well as upon radiators which are manufactured specifically7 for this purpose'.

Another particular object of the invention is to provide improved mea-ns for preventing the glass tubes or domes from cracking when they are suddenly subjected to hot or cold liquids or fluids.

Another particular object of the invention is to provide a `device of the kind described which may be locked effectively to the filling tube of an automobile radiator to prevent unauthorized removal. thereof.

Still another particular object of the invention is to provide devices of the kind described which can be manufactured economically in commercial quantities.

Many other objects and advantages of the construction herein sh own and described will be obvious to those skilled in the art from the `disclosure herein given.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claims.

ln the drawings, wherein like reference characters indicate like or corresponding` parts:

Fig. l is a front elevation o'l: a device enibodying the invention, the device being` shown in connection with an automobile radiator;

Fig. 2 is a planview of the improved de vice Shown in Fig. 1;y

Fig. 3 is a section taken on line 3-3 of Islsli ig. f is a section taken on line 4-4 of Fic. 1-

r r ig. 5 is a section taken on line o--o of ig. 6 is a longitudinal sect-ion taken through one of the parts constituting the improved device shown in Fig. 1;

Fig. 7 is a vertical section taken through a device embodying another form of the invention;

Fig. 8 is a vertical section taken through a device embodying still another form of the invention;

Fig. 9 is a section taken on line 9-9 of Fig. 8; y *Y Fig. 10 is a section taken on line 10u10 of Fig. 8;

Fig. 11 is a` section taken on line 11--11 of Fig. 8; and

Fig. 1Q is a section taken on line 12-12 of Fig. 8.

Referring for the present to Figs. 1 to 6 inclusive, I have shown a device embodying a preferred form of the invention, the device being shown mounted upon the filling tube 12 of a radiator 10 which is of the type commonly employed in automobiles, or the like. Only a fragmentary portion of the radiator is shown as the invention does not relate to the construction thereof. However, it will be noted that the radiator is provided with the usual overflow tube 14 which has its upper end centrally disposed in the filling tube 12, the lower end of the tube 14 preferably communicating with the atmosphere. The upper end of the filling tube 12 is normally closed by a cap 15, which in this instance, is pivoted by a pin 16 to apcollar 17,

the collar 17 being screw-threaded upon the .r

filling tube 1Q. In the preferred embodiment of the invention, the pin 16 passes through a lug 19 formed upon the collar 17 and has one end .seated in a recess 9.0 formed in one of a pair of lugs 22 which are preferably formed integral with the cap 15. This construction prevents unauthorized persons from quickly removing the pin 16 from the collar 17 and, therefore, prevents unauthorized removal of the cap together with the aimiziiatiis carried thereby. A bail 24 pivoted to the cap 15 may be employed'to lock the cap 15 in its closed position, the bail being adapt is preferably provided with an enlarged por ed to cooperate with la lug 2o secured to the collar 17. The cap may be ot angT suitableV construction and, in this instance, it may be assumed to represent any ot the similarly pivotally mounted radiator caps new in istence as the apparatus ca 'ried by the cap l5 may be mounted upon si-ibstantially s? y cap through which a suitable aperture may be drilled.

Formed in the cap l5 is en aperture 27 which is 'preferably concentrically disposed with respect to the overiiow tube lliand nccrunmodates a tube 29 which, at its lower end, is provided with a head 30. The heed 30 is preferably provided with lugs 32 which .are engageable with the under surface oi the cap l5 and are adapted to term passages or notches throu-gli which fluid may pass `from the filling tube l2joutv fthroug'lfi the aperture 27. It will be noted that that portion ot the tube 29 which projects tl-niougli 'the aperture 27 is ot less diameter than the aper-V ture 27. Intern'iediate its ends, the tube 29 tion 35. The purpose oit this construction will presently appear.

The upper end oi the tube 29 is prelferubly `screw-threaded into a tubular member or ezitension 37 which is preferably termed integral with a larger tubular member 38, an inwardly projecting` ange 39 beingtormed upon. the tubular member 38 to connect the tubular member??? thereto. rlhe construction is such that the 'tubular 'member 38 together with its extension 37 may be referred to as a tubular member. The tubular member 38 -cooperates with `the tube29 to term :in annular passage 138 which communicates with the iu- Aterior ot the radiator through the apert and passages "S-3. apertures or ports et@ througrh which duid may pass from the annular ,iassao'e i558 into a f or hollow member 1:2 preterubly Vtornio wardly 'extend fr annular tlonpge upon. the lower end ot the hollow mex. pret'eitabl?,T rests upon a rubber gasket /l-,f7 or the equivalent., sog-)ported by the tub ular iember 58, the flange 39 being hel d in engagement with 'the vgasket l,tf-ft lby :t collar having;h a 'central ape 'ture il? through which the do or hollow member l2 projects. is best shown in Fig. 3, the aicrture s?? is enlarged at its lowerend as indicated at to accou'imooate the tlanpje 43. a with the collar 6 .are lugs 50 which are positioned one on each side ot a lug' 5l preffcrablv formedintegral with the tubular member 38, a pin 53 being; provided lor pivoting the lugs 50 to the lug 5l. As indicated in do tted lines in Fig'. 2, one end et the pin 53 projects into e recess 54 provided in one otthe lugs 50,the construction being such'that unauthorized rcmoval of the pin 53 is prevented. Screws 5G or the equivalent, are preferably provided end so the t termed. in the head Preferably ij'ormed inte;

for rigidly securing the colla-r il@ to the tubular member 38 so that the collar can not be accidentally displaced. However it isl readily understood that 'the glass member l2 is to be replaced or ii' it is to be cleaned, the screws 56 mav be withdrawn and the colla-r t6 may be singularly displaced into a. position wherein it will permit the glass member 42 to be removed trom the device.

The .upper end of the tube 29 is preferably screw-threeded into the tubular member 37, the tube 29 beingadapted to proj ect lbeyond the screw-threads in the tubular member 37 so that the :upper edgeot the tube may be delormed to lock the tubular member 37 to the tube. Thus, it will be noted that .the upper il et lthe passage through the .tube 29 is 'rod outwardlf,7 as at 5S so that rela-'tively vthin end is provided upon the im the upper end ot the tube to expand :it so that the tube can not be readily :removed troni the tubular member 37. As best shown in 6, the screw-threads provided upon the tube 29 terminate a short distance tromfthe upper end thereof to permit this deformation oit the upper end of the tube. `Gloviously the tube 29 tien locks the tubular member B8 to the cap .'15 and prevents unauthorized removal of the improved device from the cap.V lit `dcsired, a gasket 59 may be positioned between the tubular memberv 38 and the cap l5.

In the preferred embodiment the invention, the collar 1'4" is preferably rigidly secured to the iillinff; tube l2 by a pin 50. or `the equiialent7 driven into a. bore `6l whichA eX- tends into both the collar l the filling:l tube l2. The bore Gl is preier a punch, or the nice, cnn not be used to drive the pin yout ot the bore.

-l l Y 1, 1 .15 1.! l J1 1 'lne ou el enc or ine pase ement;

by abail shlped end tube l'. liu practice, the tube S5 is Y erablv rigidly secured to upper end et the o* iiow tube ifi by puncl ine' a projection 67 into the tube S5, which preti G7 projects a depression mulluneeuslj,7 termed in tue wall ot the over-'dow tube The ballshaped end @et oi the tube G5 cooperates with the flared portion (S2 to rl a 'holland socket joint between the tube 65 and the tube 2Q., the coi' y.truotion being' such that when the cap l5 is moved into its closed position, the tiared portion 62 guides the ball-shaped por-tion (il into its correct oost passavo extendifx v closed at one Y ube. Gbvious- 7 lvj suitable tool may be introduced into 71 is positioned, the tubular member 37 functioning to center the spring in the glass memvent circulation of the cooling liquid until the liquid in the water jackets of the engines has been heated to a predetermined temperature. Then, when the thermostatic devices permit the liquid to circulate, a quantity thereof` is ldrivenjxu) into the glass members 42 and unless the glass members are protected in some manner they will crack. However, I lind that if springs 7l, or the equivalent, are provided, they will prevent such injury to the glass members.

It willbe noted that the tubular member 37 is provided intermediate its ends with an annular groove 74 which tends to direct vapor against the interior surface of the glass member 42. In other words, when vapor is forced upward through the portsA or apertures 40 it will be forced upon the inner surface of the glass member and form a ring of water thereon which is readilydiscernible by the driver of the automobile.

The enlarged portion 35 is preferably provided upon the tube 29 to insure that an aperture of suitable diameter will be formed in the radiator cap when the device is to be assembled with the cap. Thus, assuming that the improved device is to be mounted upon a cap now in existence, an opening corresponding to the aperture 27 must be formed in the cap and this aperture must be of sufficient diameter to allow liquid and fluid to pass therethrough when the device has been assembled with the cap.V Obviously, the tube 29 can not bc assembled with a cap if the aperture therethrough is of less diameter than the enlarged portion 35. The operation of the above described device shown in Figs. l to 6, inclusive, is substantially as follows: Assuming that ther` is an adequate supply of cooling liquid in the cooling system of the automobile upon which the device is mounted and` assun'iing that the automobile is in operation, it is obvious that no active indication of any kind will. be given in the glass dome or member 42 when the temperature of the cooling fluid does not approach the boiling point. However, if for any reason, the temperature of the cooling fiuid approaches the boiling point, this fact will be indicated in the glass member 42 by a solid column of water which w'll rise and fall because of the lack of balance between the pressurel within the cooling system and the height of the column of water extending up into the glass member. If the condition w ich causes this rise in temperature of the coolingliquid is not corrected and thecooling liquid. boils with su'liicient violence to create a relatively high pressure Within the cooling system, a steady :flow of liquid through the glass dome will be observed, the liquid being discharged from the cooling system through the overflow tube 14. Briefly, the pressure created within the cooling system causes the liquid to pass up through notches or passages 33 and the aperture 27 int-o the tubular member 38 and thence through the aperture or ports 40 and the glass member 42 down through the tubular member 37 and the tube 29 into the tube (i5 which `discharges the liquid into the overflow tube 14.

Now, if it is assumed that the cooling liquid continues to waste until there is an insufit to waste continually through the overow tube 14. These stages are as follows The lirst stage: from atmospheric temperature to normal operating temperature. During this stage, no active signal isy given in the glass member 42.

The second stage: from normal operating temperature to simmering temperature which precedes violent boiling@ An unbroken column of liquid then rises and falls in the glass member' 42.

The third stage: from simmering temperature creating comparatively slight pressure to violent boiling which causes a wastage of cooling liquid because of the relatively high pressure produced in the radiator. The glass member 42 then becomes completely filled with an unbroken column of liquid flowing therethrough and wasting through the overflow tube 14.

The fourth stage: from active boiling and wasting o f a still adequate supply of cooling liquid to a comparatively superheated and wasting of a substantially overheated liquid. During Athis stage the water ring appears on the interior surface of the glass member 42 and warns the driver that the supply of cooling liquid must be replenished if the. engine is to be protected against serious injury.

In Fig. 7, I have shown another form of the invention embodied in a ldevice which resembles the ldevice shown in Figs. l to 6, inclusive. Thus, I have shown aV collar 17 which is screw-threaded upon a filling tube l 12a forming part of a radiator' 10a, the radiator 10a being of the type commonly employed lli) in automobiles or the like. Pivoted by a .pin 16 to the collar 17a is a cap lotL which is substantially .identical with the aforementioned Cap 15 .and may be looked by a bail 24 against angular displacement around the pin 16a. A tube 29a is provided with a head 30L and is screw-threaded int-o a tubular member 37L which is lneiierably formed integral with ra tubular .member 38a, the tubular `members 37L and 38 being substantially identical with the aforementioned tubular members 3T and 38. However, in this instance, the screwthreads provided in the tubular member 37a vextend above .the upper end oi. the tube 29 and Vthe Ascrew-tlireads `oit the tube 29 extend to the upper lend thereof, the impor .end oi the tube 29a -beingeXpa-nded to cause tliie screwthreads of toe-tube to 'trictionally engage the vscrew-tlneads ot the tubular member' 3T with su'tlioient torce -to prevent unauthorized removal of the tubular member Si and the tubular member 38 ormed integral there with. The tubular member .37 is joined to the tubular member 38a by a tlange 39 provided with bores or apertures 40"'L and the tube 29 projects through an aperture 27 for-.med in the cap 15,, the diameter of the aperture 27a bein- 9; of such size that vapor and y.Liquid lfmafy pass from the till-ing' tube 12a up through notches or passages 33a provided in the head 30a and thence through the aper ture '27 into the tubular member vapor then passes 'from the tubular member 38@ up .through the lbores or apertures 40 into a dome or hollow member 42a which is sub- Vsta-ntially identical in 4construuztion tothe aforementionedglass member 42.l The yglass member 4,2"L is preferably provided with a flange 48L which is rsecured to the' tubular member 38a by a collar 46 screw-,threaded upon the tubular member 38a. lit' desired, a Y`gasket 46h may be inserted between the col lar 46a and the flan/ge 43 and. a 'gasket 44 may be inserted between the tiangrc 43 and the upper end ot the tub ular member 38a. The lower end ot lthe passage entending` through the tube 29EL pre terably termin- "es in an outwardly Har-ing; sur-tace 62a w i :h is lengage able by a ball-shaped end t' 1 i( ymed upon one endof a tube'to, the tubo (35 beir adapted to telescope upon the upper end et an overflow tube 14L p` ided the radiator 103:. ln practice, the tube 65 is preferably seV cured to thc'overtiow tube 14.2L in substantially the same manner the ai: iementione'd tube G5 is secured to the overflow tube 14. A. spring; 71 @nuages the member 42 and has substantn llv ne same functions as tlie aforement The operation o in Fig. 'l is substantially identica-l to the eration -oi `the apparatus shown in Ff "o 6inolusire.

Referring),` now' to Figs. 8 to 12., inclusive, wherein I Vhaveshown still another form ot die apparatus illustrated one. il() This l 29C formed upon a member 38C projects down` ward through the aperture 27 and has a nuit 30c .screw-threaded thereon. yThe nut 30c is provided with a plurality of notches v3.3" which permit liquid. and vapor to 'flow from the lilling tube 1'2c up through the aperture 27C and thence ythrough Vpassa-ges 40c provided in the member 38. At its upper end the member 38 is provided with a central .extension .37 which corres-pondsto the afore- A .central mentioned tubular member 37. passage 38 extends through the member 38C and the extensions 29C and 317C provided thereon. A nut 30C cooperates' with the .extension 29' to secure the member 88C to the cap 15,`

a gasket '59C 'being preferably.provided between the member 38@ and the cap. The extension 3T@ projects up Yinto a dome or hollow member 42C which is substantially identical in .construction to .the aforementioned nieinber 42 and is provided with an Voutwardly extending flange 43. which extends into an enlarged portion 45C of an aperture 47Cv provided in a collar 46Cv the rcollar 46 being n 3 r., screw-threaded upon the member 38. In-

teroosed between the flan'O'e'- 43C and the collar 46C is a .gasket .44d and interposed between Y the .flange 43C and the member 38C`-is aygasket 44.l It will be noted 'that the extension 3T is undercut to provide an annular shoulder 74"'. 0bviously, when vapor ypasses upward in the passages 40C it strikes the annular Vshoulder 74 and deliects against the inner surface of the glass member 42c so that it may condense thereon and give a visible signal.

The passage through the .nut 30C is provided with an outwardly flaring surface 62 which corresponds to .the atorementioned flaring surface 62 and .is engageable by a ball-shaped end 64C lprovided upona tube 65C which is adapted to telescope `upon an overflow .tube .14C provided in the radiator 10C. The tube 65C is preferably secured to the overflow tube 14c `in substantially 'the same manner as the aforementioned tube 65 is secured to the overflow ftu'be 14. It is readily' understood that if the cap` 15c is removed `trom .the tilhng. tube 12c `and then replaced thereon, the `flaring surface 62c will guide the ball-shaped end 64 into its proper position with respect .to the passage 88d Vprovided in Y themeniber 3.8. To prevent a siphoning ac-v tion from being .set up, I preferably provide an aperture .or vent T5 in the tube 65a. s

. interposed between .the 'upper end of the glass member 42C and an annular shoulder 7 0c provided upon the extension 3? is a compression spring 7lc which has substantially the same function as the aforementioned spring 7l. An arcuate member '78C is preferably formed integral with the collar ab and is adaptedto protect the glass mem ber 42.

The operation of the device ilhistrated in Figs. 8 to 1Q, inclusive, is substantially identical with the operation oi' the device shown in Figs. 1 to 6, inclusive.

Having thus described my invention, it is obvious that various ilmuaterial modifications may be made in the same nf'ithout depart-ine from the spirit ot my invention; hence fdo not wish to be umlerstood as linut ing myself to the exact roi-m, cristruction, arrangement and con'ibination oi parts herein shown and described, or uses mentioned.

That I claim as new and desire secure by Letters Patent is: Y

l. An indicating device of the hind described adapted to be mounted upon the elosure member for the lilling opening o'l" an automobile radiator provided with an overflow pipe, said indicating device comprising a tube arranged to project through an aperture in said closure member, tubular member having a tubular extension engageable with the upper end or said tube, transparent hollow member communicating with the interior. of said radiator through said tubular member and said aperture, said hollow member communicating with said tube through said tubular extension, and second tube whereby the first tube communicates with said overslow pipe. f

2. An indicating device ot the kind described adapted to be mounted upon the closure member for the filling opening of an automobile,A radiator provided with an over How pipe, said indicating device comprising a tube arranged to project through an apen ture in said closure member, a tubular member having a tubular extension engageable with the upper end of said tube, a transparent hollow member communicating with the interior of said radiator through said tubular member and said aperture, said. hollow member connnunicating 'with said tubo through said tubular extension, and a second tube whereby the first tube communicates with said over-iow pipe, said second tube being provided with a ball-shaped end engageable with the first tube to insure proper alignment of said tubes when they engage each other.

3. An indicating device ot 'the'jkind described adapted to be mounted upon the closure member for the filling opening of an automobile radiator provided with an overflow pipe, said indicating device comprising a tube arranged to project through an aperture in said closure member, means provided upon the tube ior engaging the inner surface of the closure member, said` means being lormed with passages whereby fluid may flow from the interior ot said radiator up through said aperture along the outer surface ot said tube, a tubular member engageable with said tube and adapted to cooperate with tomobile radiator provided with an over-flow pipe, said indicating device comprising a tube arranged to project through an aperture in. said closure member, means provided upon the tube tor engaging the inner surface ot the closure member, said means being formed with passages whereby fluid may flow from the interior oft said radiator up through said aperture along the outer suri'aee ot said tube, a tubular member engageable with said tube and adapted to cooperate with said means to clamp the indicating device to said closure member,a substantially transparent hollow member mounted upon said tubular member and communicating therewith and through said passages with the interior oil the radiator, a second tube whereby said iirst tube communicates directly with said. overiiow pipe, said hollow member communicating with said over-flow pipe through said first and second tubes, and said second tube being provided with a ball-shaped end en gageable with the Afirst tube to insure proper aiigmnent oi? said tubes when they engage each other.

5. An .indicating device ol' the kind described adapted to be mounted upon the closuremember for the filling opening of an automobile radiator provided with an overflow pipe, said indicating device comprising a tube arranged to project through an aperture in said closure member, a tubular member having a tubular extension engageable with the upper end of said tube, a transparent hollow member communicating with the in terior of said radiator through said tubular member and said aperture, means adjacent to said extension functioning as a balile member to retard. the low of fluid from the radiator into said hollow member, said hollow member communicating with said tube through said tubular extension, and a second tube whereby the lirst tube communicates with said overiow pipe.

6. An indicating device of the kind described adapted to be mounted on the closure member for the iilhnglopening ol' anautomobile radiator having an over-flow pipe,

VAsaid indicating device comprising a tube arranged to project through an aperture in said closure member, a second tube connecting the first tube to the over-flow pipe, a tubular memberI dispo-sed concentrically with the tube and having an internal diameter larger than the external diameter' of the iirst tube bile radiator having an over-dow pipe, sait-l indicating device comprising a tube arranged to project through an aperture in said closure member, a second tube connecting the first tube to the over-flew pipe, a tubular member disposed concentrically with the lirst tube and having an internal diameter larger than the external diameter ot the lirst tube `to form an annular passage around the Vli-rst tube, a second tubular Vmemberr carried by the tubular member at the upper end thereof and adapted to cooperate with the iirst 'tube to form an extension thereof, a Yglass dome communicating with said annular passage and with the passage in said first tube and said second tubular member, and apertured means extending between the first and second tubular members for retarding the flow of fluid through said annular passage.

8. An indicating device of the hind described adapted to be mounted upon an apertured closure member for the filling opening of an automobile radiator provided with lan over-'flow pipe therein, said indicating ydevicecomprising a vtube arranged to project through said closure member, a tubular member disposed around said tube to form an annular passage communicating` with the interior of the radiator through the apertured closure member, a transparent hollow 'member'mounted upon said tubular Vmember and communicating with said annular passage, said hollow memberalso communicating with said'tube, and a second tube whereby the vfirstmentioncd yt-ube communicates with l said over-flow pipe. Y

"9. An indicating-device o the hind described adapted tobe mounted upon an aperturco closure member ior the li ling opening of an automobile radiator provided with an over-'flow pipe therein, said indicating device comprising a tube Varranged* to project through said closure member, a tubular mem- Y tachably Y municating with f.

ber disposed around said tube to form an annular passage communicating with the interior ot said radiatorl through saidV closure member, means. at one end oi said annularV passage for retarding the i'jiow of fluid therethrough, a vsubstantially transparent hollow member mounted upon said tubular member and communicating with said annular passage, said hollow member also comm-unicating with said tube, and a second tube whereby the lirst-mentioned tube communicates with said over-iiow pipe.. Y Y

l0. in indicating device of the kind described adapted to be mounted upon an apertured closure member for the tilting opening ot an kautonmbile radiatorv provided withan over-flow pipe therein, said indicating device comprising a tube projecting through said closure member, a second tube whereby7 the lirst-i itioned tube comn'iunicateswith said over-flow pipe, a tubular member disposed around said Vtirst-mentioned tube to provide :in annular passage communicating with the interior oi' said radiator through said'closurc 'memberg a substantially transparent hollow 'nef iber mounted upon the upper end ol' said utular member and communicating with i? l annular pas im, and. an apertured collar pivoted to said'tubular member itor securing In fr said -hollow member thereto, said ,hollow member .also connnunicating with said iirstmentioned tube. l 4

ll. ln combination with an automobile radiator having an over-lowpipe and pro-' Yvided with a iillingV opening, a pivoted closure member said iilling opening,said closure member being provided with an aperture theretln'ough, a tube projecting through said aperture, a second tube whereby said hust-mentioned tube'communicatcs with said over-brewV pipe, said tirst-n'ientioned tube bei- 3g "detachably engageable with said second tune, a tubular member disposed around said inst-mentioned tube to provide an annular y)assa'ge communicating with the interior of said radiator through'said' aperture, and a substantially transparent hollow member deseciued to saidtubular member, said hollow member being arranged to c inmunieat e with said annular passage and with said v,-mentioncd tube. Y V

l2, An indicating device'ot the kind described adapted to be mounted upon Van apertured closure member 'for the lilliug opening ot vautomobile radiator provided with an over-flow pipe therein, said, indicating device comprising a tube arranged to `project throughisaid closurel member and provided with means engageable withthe inner side et said closure member, said tube being,"

adaptedto be connected to said-overdow pipe, a tubular member disposed around said tube to providerun annular pass nfe-comle interior ot said radiator through said closure member, a portion of u said tube being expanded to rigidly secure it to said tubular member, and said tubular member being Varranged to cooperate with said means to secure said device to said closure member and a substantially transparent hollow member mounted upon said tubular member, said hollow member being arranged to communicate with said annular passage and with said tube.

13. In an indicating device of the class described, a hollow glass member through which fluid ma flow, and resilient metallic means arrangedy in said hollow member to prevent cracking thereof when said hollow member is subjected to fluid of a temperature which differs from the temperature thereof.

14. A device of the kind described adapted to be mounted upon the closure member for the filling opening of an automobile radiator provided with an overflow pipe, said indicating device comprising a tube which projects through an aperture in said closure member and is adapted to discharge into said overflow pipe, a tubular member having a tubular extension engageable with the upper end of said tube, a transparent hollow member communicating with said radiator through said tubular member and said aperture, and means adjacent to Said extension functioning as a baffle member to retard the flow ofvfluid fron the radiator into said hollow member, said hollow member communicating with said tube through said tubular extension.

15. A device of the kind described adapted to be mounted upon the closure member for the filling opening of an automobile radiator' provided with an overflow pipe, said device comprising a tube arranged to project through an aperture in said closure member and provided with a head engageable with the inner surface of said closure member, said head being provided with a passage whereby fluid may flow from said radiator up through said aperture in said closure member, said tube being adapted to discharge into said overflow pipe, a tubular member disposed above said closure member and engageable with said tube to secure said device to said closure member, said tubular member being of a larger diameter than said tube to provide an annular passage around said tube through which fluid may flow from saidV aperture, and a hollow transparent member carried by said tubularmember and arranged to communicate with said annular passage and said tube.

16. An indicating device of the kind described, adapted to be mounted upon the closure member of the filling opening of an automobile radiator, said indicating device comprising a glass member,means for mounting said glass member upon the closure member, means for permitting cooling fluid from the radiator to come into contact with said glass member, and metallic means carried by said last named means and engaging a portion of said glass member to prevent cracking thereof when it is subjected to fluid differing in temperature from that ofthe glass.

17. In combination with a radiator having a filling opening and an overflow pipe, a hollow glass member arranged above said filling opening and forming a passage whereby fluid may flow from said radiator to said overflow pipe, tubular means constituting a prolonga tion of said overflow pipe andentending into said hollow member, and metallic means supported by said tubular means and contacting with said hollow member to prevent cracking thereof when the latter is subjected to e. fluid of a temperature different from that of said hollow member.

18. An indicating device of the kind described, adapted to be mounted upon the closure member of a filling opening of' an automobile radiator, said indicating device comprising a glass member, means for mounting said glass member upon the closure member, tubular means supported within said hollow member, and metallic means carried by said tubular means and engaging said glass meniber, said metallic means being adapted to prevent cracking of the glass member when it is subjected to fluidvdiflering in temperature from that of the glass.

19. An indicating device of the kind dcscribed comprising an apertured closure member for the filling opening of an automobile radiator provided with an overflow pipe, a substantially transparent hollow member mounted above the closure member and adapted to receive vapor and liquid from said radiator through said aperture in said closure member, tubular means mounted upon said closure member and arranged to communicate with the interior of said hollow member, said tubular means being so constructed that vapor and liquid may pass through said aperture in said closure member up'into said hollow member, and a tube adapted to be positioned upon said overflow pipe and arranged to form a ball and socket joint with said tubular means, said tube being adapted to discharge vapor and liquid from said hollow member into said overflow pipe.

20. An indicating device of the kind described comprising an apertured closuremember for thel filling opening` of an automobile radiator provided with an overflow pipe, a substantially transparent hollow member mounted above the closure member and adapted to receive vapor and liquid from said radiator through said aperture in said closure vmember, tubular means mounted upon said closure member and arranged to communicate with the interior of said hollow member, said tubular means being so constructed that vapor and liquid may pass through said aperture in said closure member up into said hollow member, and means disposed at one end of the overflow pipe for forming :L hall ond sock-ei: joint with Said tubular nien/ris,y snid-A tnbnler menno loe-ing adapted; to discharge vapor and liquid from said hollow member into sai-d overl-low pipe tlirongll said ball and' Soeliet 21. The comhino-tionwith :in iiidieaising de- Vice comprisingl an imperia ,rodi @Josine-member lier the {illing opening of an automobile mcliator provided With an, overflow pipe, a Sub,- St'antially transparent hollowT member mounted above the closure member and ecl-fipaed,y to

receive liquid andv Vapor from Said radiator through sii-idA aperture in Sai d1 Closure inemher, and tubular means ooiiiniunieifliing with the interior of .ea-id hollow nfiemhei and :iid ed to diseharge Va )or sind liquid from' seid holloirT member di inenns arranged ai? onelend of said overflow pipe for forming a, ball ndl Seel' 1; joint wilgi Said tubular niezmelf, saii'l over low pipe Connnnnieating with Seid7 h ollow ineinher through said hall and some-t joint. and said tubular means.

In testimony whereof,4 I have hereunto e-gned my nfl-me.

Jo' W. ANDERSON. 

